Abstract

Disposable filter cartridge of the type in which the annular filter element fits inside a thin, sheet metal cup of which the open end is fitted with a thin, sheetl metal cover backed internally by a thick disc providing an axial bore internally threaded to serve as an outlet connection. The disc has pressed-up, radial ribs and the peripheral end of each rib presents, in plan, a concave cutout into the disc's circumference, resulting from retraction during the rib-pressing operation, the circumferential arcs of the disc between its ribs are clamped between an internal shoulder inside the cup and the metal end cover when it is secured to the cup, pref. by a rolled end-seam. The cartridge is spec. a disposable oil-filter cartridge. Partic for internal combustion engines, compressors, vacuum pumps and oil-hydraulic systems.